ubdate

node_modules/gulp-clean-css/index.js

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+const applySourceMap = require('vinyl-sourcemaps-apply');
+const CleanCSS = require('clean-css');
+const path = require('path');
+const PluginError = require('plugin-error');
+const through = require('through2');
+
+module.exports = (options, callback) => {
+
+  let _callback = callback || (o => undefined);
+
+  return through.obj(function (file, enc, cb) {
+
+    let _options = Object.assign({}, options || {});
+
+    if (file.isNull()) {
+      return cb(null, file);
+    }
+    if (file.isStream()) {
+      this.emit('error', new PluginError('gulp-clean-css', 'Streaming not supported!'));
+      return cb(null, file);
+    }
+
+    if (file.sourceMap) {
+      _options.sourceMap = JSON.parse(JSON.stringify(file.sourceMap));
+    }
+
+    const content = {
+      [file.path]: {styles: file.contents ? file.contents.toString() : ''}
+    };
+    if (!_options.rebaseTo && _options.rebase !== false) {
+      _options.rebaseTo = path.dirname(file.path);
+    }
+
+    new CleanCSS(_options).minify(content, (errors, css) => {
+
+      if (errors) {
+        return cb(errors.join(' '));
+      }
+
+      let details = {
+        'stats': css.stats,
+        'errors': css.errors,
+        'warnings': css.warnings,
+        'path': file.path,
+        'name': file.path.split(file.base)[1]
+      };
+
+      if (css.sourceMap) {
+        details['sourceMap'] = css.sourceMap;
+      }
+      _callback(details);
+
+      file.contents = new Buffer.from(css.styles);
+
+      if (css.sourceMap) {
+        const iMap = JSON.parse(css.sourceMap);
+        const oMap = Object.assign({}, iMap, {
+          file: path.relative(file.base, file.path),
+          sources: iMap.sources.map(mapSrc => path.relative(file.base, mapSrc))
+        });
+        applySourceMap(file, oMap);
+      }
+      cb(null, file);
+    });
+  });
+};